With its heavy-duty construction, this timer is designed to be weatherproof for use outdoors in harsh outdoor conditions. You will be able to automate your outdoor electrical lights, displays, accent lighting, and other decorations. The timer utilizes a built-in light sensor to determine the amount of available light. Connected appliances can be programmed to turn on at dusk/off at dawn or operate in chosen increments of time (1-9 hours from dusk). The timer will ensure your lights or appliances won't be on during the day when it isn't necessary, avoiding wasted energy to save you money on your electricity bills. Programming can be completed in a matter of minutes and will repeat daily.